Page Information

Title:	FIO39-C. Do not alternately input and output from a stream without an intervening flush or positioning call
Author:	Shaun Hedrick	Jun 11, 2007
Last Changed by:	Francesco Mariani	Aug 06, 2025
Tiny Link: (useful for email)	https://wiki.sei.cmu.edu/confluence/x/L9YxBQ
Export As:	Word · PDF

SEI CERT C Coding Standard (2)     Page: CC. Undefined Behavior     Page: FIO05-C. Identify files using multiple file attributes

SEI CERT C++ Coding Standard (1)     Page: FIO50-CPP. Do not alternately input and output from a file stream without an intervening positioning call

Parent Page     Page: Rule 09. Input Output (FIO)

• fortify
• compass/rose
• nptc
• fio
• rose-partial
• input
• rule
• nptc-thread
• nptc-wpa
• in-cpp

Time	Editor
Aug 06, 2025 14:14	Francesco Mariani	View Changes
May 06, 2025 10:42	David Svoboda	View Changes
May 05, 2025 09:05	Caden Milne	View Changes
REM Cost Reform
Mar 27, 2025 16:36	Caden Milne	View Changes
Identify undefined behavior
Dec 12, 2024 01:24	Swasti Shrivastava

External Links (16)
    https://www.kb.cert.org/vulnotes/bymetric?searchview&query=…
    https://wiki.sei.cmu.edu/confluence/pages/viewpage.action?p…
    https://wiki.sei.cmu.edu/confluence/pages/viewpage.action?p…
    https://wiki.sei.cmu.edu/confluence/display/cplusplus/FIO50…
    https://wiki.sei.cmu.edu/confluence/pages/viewpage.action?p…
    https://wiki.sei.cmu.edu/confluence/pages/viewpage.action?p…
    https://wiki.sei.cmu.edu/confluence/display/c/Cppcheck
    cwe.mitre.org/
    https://wiki.sei.cmu.edu/confluence/pages/viewpage.action?p…
    https://wiki.sei.cmu.edu/confluence/display/c/How+this+Codi…
    https://wiki.sei.cmu.edu/confluence/display/c/AA.+Bibliogra…
    https://www.mathworks.com/help/bugfinder/ref/certcrulefio39…
    https://cwe.mitre.org/data/index.html664.html
    https://wiki.sei.cmu.edu/confluence/display/c/Klocwork
    https://wiki.sei.cmu.edu/confluence/display/c/Polyspace+Bug…
    https://wiki.sei.cmu.edu/confluence/pages/viewpage.action?p…

SEI CERT C Coding Standard (26)     Page: Cppcheck_V     Page: Cppcheck Premium     Page: PC-lint Plus     Page: Polyspace Bug Finder_V     Page: LDRA     Page: Parasoft_V     Page: AA. Bibliography     Page: Klocwork_V     Page: PC-lint Plus_V     Page: ERR07-C. Prefer functions that support error checking over equivalent functions that don't     Home page: SEI CERT C Coding Standard     Page: Astrée_V     Page: Helix QAC     Page: Cppcheck Premium_V     Page: Security Reviewer - Static Reviewer     Page: LDRA_V     Page: BB. Definitions     Page: Helix QAC_V     Page: Axivion Bauhaus Suite_V     Page: Security Reviewer - Static Reviewer_V     Page: CC. Undefined Behavior     Page: CodeSonar     Page: Astrée     Page: Rose     Page: Parasoft     Page: CodeSonar_V